DR. RUSSELL EVAN LEONG M.D.
NPI 1518961069
Allergy & Immunology - Allergy in San Francisco, CA


Quality Rating: 81.41 out of 100 score

NPI Status: Active since June 10, 2005

Contact Information

3838 CALIFORNIA ST
RM 108
SAN FRANCISCO, CA
ZIP 94118
Phone: (415) 221-0320
Fax: (415) 221-0329

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  • Individual
  • Male
  • Years of Experience 48
  • Allergy & Immunology
  • Allergy
  • Accepts Medicare Approved Payment
  • PECOS Enrolled

About RUSSELL LEONG

This page provides the complete NPI Profile along with additional information for Russell Leong, a provider established in San Francisco, California with a medical specialization in Allergy & Immunology, focusing in allergy and more than 48 years of experience. He graduated from Un Of California, Irvine, College Of Medicine in 1978. The healthcare provider is registered in the NPI registry with number 1518961069 assigned on June 2005. The practitioner's primary taxonomy code is 207KA0200X with license number G40648 (CA). The provider is registered as an individual and his NPI record was last updated 18 years ago.

NPI
1518961069
Provider Name
DR. RUSSELL EVAN LEONG M.D.
Gender
Male
Entity Type
Individual
Location Address
3838 CALIFORNIA ST RM 108 SAN FRANCISCO, CA 94118
Location Phone
(415) 221-0320
Location Fax
(415) 221-0329
Mailing Address
3838 CALIFORNIA ST ROOM 208 SAN FRANCISCO, CA 94118
Mailing Phone
(415) 221-0320
Mailing Fax
(415) 221-0329
Medical School Name
UN OF CALIFORNIA, IRVINE, COLLEGE OF MEDICINE
Graduation Year
1978
Is Sole Proprietor?
Yes
Enumeration Date
06-10-2005
Last Update Date
07-17-2007
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Specialty - Primary Taxonomy

The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.

Classification

Allergy & Immunology Allergy

Taxonomy Code
207KA0200X
Type
Allopathic & Osteopathic Physicians
License No.
G40648
License State
CA
Taxonomy Description
A physician who specializes in the diagnosis, treatment, and management of allergies. Source: National Uniform Claim Committee

Medicare Participation & PECOS Enrollment Status

Russell Leong is registered with Medicare and accepts claims assignment, this means the provider accepts the approved amount for the cost of rendered services as full payment. Participating providers may not charge beneficiaries more than the approved amount for their services. Please keep in mind that beneficiaries still have to pay a coinsurance or copayment amount for a visit or service.

Russell Leong is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.

What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.

  • Is the provider registered in PECOS? Yes

  • PECOS PAC ID: 1456414812

    What is the PECOS Associate Control ID?
    A PAC ID is a unique 10-digit number assigned to an individual or organization healthcare provider in PECOS. The PAC ID is used to link together all the provider information, like tax identification numbers and organizational names. A PAC ID can be connected to multiple Enrollment IDs if an individual or organization has enrolled in PECOS more than once.

  • PECOS Enrollment ID: I20090110000200

    What is the Provider Enrollment ID?
    The Enrollment ID is a unique alphanumeric 15-digit code assigned to each new provider's PECOS enrollment application. The Enrollment ID is used to link together all the provider enrollment information like enrollment type, state, provider specialty, and reassignment of benefits.

  • Accepts Medicare Assignment? Yes

    What does it mean "accepts medicare assignment"?
    When a provider accepts Medicare assignment, the provider agrees to be paid directly by Medicare and to accept the payment amount approved by Medicare. Additionally, the provider agrees to not bill patients for more than the Medicare deductible and coinsurance amounts.
    A provider who doesn't accept assignment may charge you up to 15% over the Medicare-approved amount. This is known as the limiting charge. You may have to pay this amount, or it may be covered by another insurer.

  • Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes

  • Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes

  • Eligible to Order or Refer a Home Health Agency (HHA): Yes

  • Eligible to Order or Refer Power Mobility Devices: Yes

Overall MIPS Quality Performance

The provider participated in CMS Quality Payment Program under the Merit-based Incentive Payment System (MIPS) and has an overall final score of 81.41, based on four performance areas: quality, improvement activities, promoting interoperability, and cost. The purpose of this information is to help people with Medicare make informed decisions and incentivize doctors and clinicians to maximize performance.

The Merit-based Incentive Payment System (MIPS) is a way providers could use to participate in CMS Quality Payment Program (QPP). The MIPS program affects clinician reimbursement for Part B covered professional services and also rewards them for improving the quality of patient care and outcomes.

  • Final Score: 81.41 out of 100

    The MIPS program evaluates providers across multiple categories with a specific weight for each category resulting a in a MIPS final score that ranges from 0 to 100 points. The MIPS Final Score determines whether providers receive a negative, neutral or positive MIPS payment adjustment.

  • Quality Score: 83.27

    The Quality category assesses providers performance on clinical practices and patient outcomes under the traditional MIPS program. The quality measures help identify the quality of healthcare processes, outcomes, and patient experiences. The Quality measure category compromises 40% providers final MPIS scores.

    There are six collection types for MIPS quality measures: Electronic Clinical Quality Measures (eCQMs), MIPS Clinical Quality Measures (CQMs), Qualified Clinical Data Registry (QCDR) Measures, Medicare Part B claims measures, CMS Web Interface measures and The Consumer Assessment of Healthcare Providers and Systems (CAHPS) for MIPS Survey.

  • Promoting Interoperability Score: 100

    The Interoperability category measures the providers ability to use technology to exchange and make use of healthcare information in a way that is less burdensome and improves outcomes. The Interoperability measure category compromises 25% providers final MPIS scores.

    The MIPS Interoperability measure focuses on the use of certified electronic health record technology (CEHRT) to improve patient access health information, the exchange of information between clinicians and pharmacies and the systematic collection, analysis, and interpretation of healthcare data.

  • Improvement Activities Score: 40

    The Improvement Activities performance category evaluates the providers participation in clinical activities that support the improvement of clinical practice, care delivery, and outcomes. Providers have the option to choose 2 to 4 activities from an inventory of over 100 improvement activities. Providers typically choose the activities that best fit their needs. The improvement activities measure category compromises 15% providers final MPIS scores.

    The Improvement measures aim to better patient engagement, patient safety and other areas of patient care. The Improvement Activities category compromises 15% of providers final MPIS scores.

  • Cost Score: 54.77

    The Cost performance category asses the amount and types of services provided and how clinicians coordinate care and seek improvement of health outcomes by ensuring patients receive the appropriate services.

    Although providers don't determine the price of healthcare services they are important in delivering high-quality care at a reasonable cost. The Cost measures category compromises 20% of providers final MPIS scores.

  • Cost Score: 54.77

    The Cost performance category asses the amount and types of services provided and how clinicians coordinate care and seek improvement of health outcomes by ensuring patients receive the appropriate services.

    Although providers don't determine the price of healthcare services they are important in delivering high-quality care at a reasonable cost. The Cost measures category compromises 20% of providers final MPIS scores.

Reviews for DR. RUSSELL EVAN LEONG M.D.

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NPI Validation Check Digit Calculation


The following table explains the step by step NPI number validation process using the ISO standard Luhn algorithm.

Start with the original NPI number, the last digit is the check digit and is not used in the calculation.
1518961069
Step 1: Double the value of the alternate digits, beginning with the rightmost digit.
25281862012
Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24.
2 + 5 + 2 + 8 + 1 + 8 + 6 + 2 + 0 + 1 + 2 + 24 = 61
Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit.
70 - 61 = 99

The NPI number 1518961069 is valid because the calculated check digit 9 using the Luhn validation algorithm matches the last digit of the original NPI number.

Other Providers at the Same Location


The following 20 providers are registered at the same or nearby location.

NPI Name / Type Taxonomy Address
1588667422 YANEK S.Y. CHIU M.D.
Individual
Colon & Rectal Surgery3838 CALIFORNIA ST RM 616
SAN FRANCISCO, CA 94118
(415) 668-0411
1053314989 LAURENCE F YEE M.D.
Individual
Colon & Rectal Surgery3838 CALIFORNIA ST RM 616
SAN FRANCISCO, CA 94118
(415) 668-0411
1447253380 MICHAEL E ABEL M.D.
Individual
Colon & Rectal Surgery3838 CALIFORNIA ST RM 616
SAN FRANCISCO, CA 94118
(415) 668-0411
1275520819 MICHELLE L LI M.D.
Individual
Surgery3838 CALIFORNIA ST RM 616
SAN FRANCISCO, CA 94118
(415) 668-0411
1447231618DR. ERIC RICHARD KWOK M.D.
Individual
Internal Medicine3838 CALIFORNIA ST 310
SAN FRANCISCO, CA 94118
(415) 387-1534
1568443307DR. ALVIN DAVID WONG M.D.
Individual
Internal Medicine3838 CALIFORNIA ST 310
SAN FRANCISCO, CA 94118
(415) 387-1534
1801871439 RALPH ROMAN ROAN M.D.
Individual
Surgery3838 CALIFORNIA ST SUITE 610
SAN FRANCISCO, CA 94118
(415) 752-1001
1407827405DR. GERALD ALAN GELLIN MD
Individual
Dermatology3838 CALIFORNIA ST SUITE 805
SAN FRANCISCO, CA 94118
(415) 668-2400
1437104031 M MING QUAN MD
Individual
Obstetrics & Gynecology3838 CALIFORNIA ST STE 408
SAN FRANCISCO, CA 94118
(415) 221-6668
1740219815 HOLLY C HOLTER
Individual
Obstetrics & Gynecology3838 CALIFORNIA ST SUITE 510
SAN FRANCISCO, CA 94118
(415) 668-1560
1467481655 NELDEN WILLIAM HAGBOM
Individual
Obstetrics & Gynecology3838 CALIFORNIA ST SUIE 510
SAN FRANCISCO, CA 94118
(415) 668-1560
1306875232SAN FRANCISCO PHYSICIANS FOR WOMEN, INC
Organization
Obstetrics & Gynecology3838 CALIFORNIA ST SUITE 510
SAN FRANCISCO, CA 94118
(415) 668-1560
1346279932 PATRICK Y WONG M.D.
Individual
Specialist3838 CALIFORNIA ST SUITE #514
SAN FRANCISCO, CA 94118
(415) 386-7555
1497786040 MELODY CHONG DPM
Individual
Podiatrist3838 CALIFORNIA ST STE. 601
SAN FRANCISCO, CA 94118
(415) 386-3338
1346265790DR. CATHERINE LEONIE COLLINS M.D.
Individual
Internal Medicine3838 CALIFORNIA ST SUITE 416
SAN FRANCISCO, CA 94118
(415) 387-8800
1154349769 KATHRYN J CLARK
Individual
Obstetrics & Gynecology3838 CALIFORNIA ST SUITE 510
SAN FRANCISCO, CA 94118
(415) 668-1560
1063428225DR. RANDOLPH H. CHASE M.D.
Individual
Internal Medicine3838 CALIFORNIA ST SUITE 608
SAN FRANCISCO, CA 94118
(415) 668-2851
1992713135 THOMAS L ENGEL MD
Individual
Otolaryngology3838 CALIFORNIA ST SUITE 505
SAN FRANCISCO, CA 94118
(415) 751-4914
1568471365MR. PETER A POLLAT MD
Individual
Dermatology3838 CALIFORNIA ST SUITE 308
SAN FRANCISCO, CA 94118
(415) 668-4100
1972514149HELEN S MANBER
Organization
Dermatology3838 CALIFORNIA ST SUITE 308
SAN FRANCISCO, CA 94118
(415) 668-4100

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1518961069, enumerated in the NPI registry as an "individual" on June 10, 2005

The provider is located at 3838 California St Rm 108 San Francisco, Ca 94118 and the phone number is (415) 221-0320

The provider's speciality is Allergy & Immunology with taxonomy code 207KA0200X with a focus in Allergy

The provider has more than 48 years of experience. He graduated from Un Of California, Irvine, College Of Medicine in 1978.

Yes, as of June 20, 2025 the provider is registered in PECOS and is eligible to order health care services or supplies for Medicare patients. If you are a beneficiary the provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.

The provider has an overall high rating in the following quality measures: quality clinical practices and patient outcomes and experiences , uses technology to exchange and make use of healthcare information.

This NPI record was last updated on June 10, 2005. To officially update your NPI information contact the National Plan and Provider Enumeration System (NPPES) at 1-800-465-3203 (NPI Toll-Free) or by email at [email protected].
NPI Profile data is regularly updated with the latest NPI registry information, if you would like to update or remove your NPI Profile in this website please contact us.